CPW 11th Grade Science

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1 SQUADS #4 CPW 11th Grade Science Learning Intentions - Today, I am going to address these College Readiness Standards in Science: 1. Interpretation of Data Interpretation of Data Evaluation of Models, Inferences, and Experimental Results Interpretation of Data Scientific Investigation Scientific Investigation Interpretation of Data Success Criteria I know I am successful when I can select data from a complex graph, compare data from a complex data presentation, identify key assumptions in a graph, translate information into a table from a graph, predict results of an additional measurement in an experiment, understand the methods and tools used in an experiment, and identify a mathematical relationship between data.

2 Quick Note! Today s questions are based on the printed passage you will receive shortly. After reading your passage individually or as a group, choose the best answer to each question. You may refer to the passages as often as necessary. You have 2 Minutes to read your passage!

3 11 th Grade Science #1. Which of the objects represented on Graph I is moving at a constant velocity in the positive direction? F. A G. B H. C J. D

4 Correct Answer: J The velocity of an object is the slope of the position versus time graph. Only objects A, C, and D have straight lines representing constant velocity. Object B has a curved position versus time graph. The graph for object D has a positive slope and the graph for object C has a negative slope. The sign of the slope of the position versus time graph represents the sign or direction of the velocity. This means that object D, which has a positive, constant slope on the position versus time graph represents an object moving in the positive direction with constant velocity.

5 11 th Grade Science #2. Which of the objects represented on Graph I could also be represented by Graph II? A. A B. B C. C D. D

6 Correct Answer: C The object should be moving in the negative direction with constant velocity. The object from Graph I that is moving in the negative direction with constant velocity is object C. To have a constant velocity on Graph I, the object must show a straight line on the position versus time graph. Only objects C and D have straight lines with non-zero constant slopes on the position versus time graphs. Object D has a positive slope on its position versus time graph in Graph I. This means its velocity versus time graph should be in the positive region of the graph. Object C meets both requirements since it has a negative, constant slope on its position versus time graph in Graph I, its velocity versus time graph is a horizontal line in the negative region as represented by Graph II.

7 11 th Grade Science #3. Which of the following accurately describes the motion of the object in Graph III? F. The object is moving in the positive direction, slowing down. G. The object is moving in the negative direction, speeding up. H. The object is moving in the positive direction, speeding up. J. The object is moving in the negative direction, slowing down.

8 Correct Answer: J On Graph III, the direction the object is moving in is represented by what region of the graph the line is drawn in. Only the sign of the velocity values indicate the direction of motion. Since the line is in the negative region of the velocity versus time graph the object is moving in the negative direction. The slope of a velocity versus time graph represents the acceleration of the object. In this case the slope is positive. This means that while the velocity is in the negative direction the acceleration is in the positive direction. Whenever the acceleration is in the opposite direction than the velocity, the object will slow down. The fact the object is slowing down can be determined by looking at the velocity values which become closer to zero as time passes indicating the object is slowing down. Object D is moving in the negative direction and slowing down.

9 11 th Grade Science #4. The data listed in Data Table I could be used to construct which graph? A. Graph I B. Graph II C. Graph III D. Graph IV

10 Correct Answer: C Data table I includes time and velocity information that indicates it would be used to make a velocity versus time graph. Of the two velocity versus time graphs, Graph II shows an object with constant velocity since the line on this graph is horizontal, this indicates that the data table used to make Graph II should have the same value for the velocity for all of the times. This is not the case for Data Table I. This leaves Graph III as the only option. For this velocity versus time graph, the velocity decreases in magnitude over time as seen on the Graph III. The values for the velocity in Data Table I reflect this decrease in magnitude.

11 11 th Grade Science #5. If objects A, B, C, and D represented in Graph IV were in a race, which would come in 3 rd place? A. A B. B C. C D. D

12 Correct Answer: A Object A has the third steepest slope and would therefore come in 3 rd in a race with Objects A, B, C, and D.

13 11 th Grade Science #6. Before conducting this experiment, what would be the most important thing to check to ensure accurate results? F. The diameter of the objects used G. The table where you will record the data H. The weight of the objects used J. The motion detector

14 Correct Answer: J The weight and diameter of the objects and the table you create will not affect the results, however, your motion detector will affect your results.

15 11 th Grade Science #7. According to Data Table I, what was the difference in velocity between minutes 3 and 4? A m/s B m/s C m/s D m/s

16 Correct Answer: B According to Data Table I, the velocity at minute 3 was m/s and the velocity at minute 4 was If you subtract those numbers, the difference is m/s.

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